Botany> The function of leghaemoglobin in the roo...

The function of leghaemoglobin in the root nodules of legumes is Inhibition of nitrogenase activityoxygen removal nodule differentiation expression of nif gene

somya , 10 Years ago

Grade 12th pass

2 Answers

Gaurav

Last Activity: 10 Years ago

Hello Student
Correct answer is 2. Oxygen removal
The root nodiles of legume contains enzyme nitrogenase and leghaemoglobin. Nitrogenase is highly sensitive to the molecular oxygen and requires that ensure that the enzyme is pretected from oxygen to protect these enzyme the nodule contains an oxygen scavenger called leghaemeglobin

khushi

Last Activity: 5 Years ago

(B) OXYGEN REMOVAL

In plants colonised by Rhizobium, such as alfalfa or soyabeans, the presence of oxygen in the root nodules would reduce the activity of the oxygen-sensitive nitrogenase, which is an enzyme responsible for the fixation of atmospheric nitrogen. Leghemoglobin buffers the concentration of free oxygen in the cytoplasm of infected plant cells to ensure the proper function of root nodules. This allows an oxygen concentration that is low enough to allow nitrogenase to function, but high enough that it can provide the bacteria with oxygen for respiration.